I get why people are having trouble defending them but it's really not cool that Mojang is pushing to enforce their own personal requirements on self-hosted servers. It's one thing if it was an official server or hosted on realms or something, but this is just a bit too far in my opinion.
And given the recent pivots by tech companies in the US there's very little reason to think this same set of rules couldn't be applied to groups like trans people in the future.
It's better to push back on this sort of stuff early, instead of waiting for it to personally impact you once it's already built up momentum.